Cable conduit



E. W. HAM.

CABLE CONDUIT.

APPLICATION msn 1AN.21. 1919 Patentedsept. 9,1919. 4

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EDWIN w. Aprima, er` wononsmnrt,` ivressnorrusnr'rs.

CABLE-connur,

To all 'whom it may concern L' Be it known that 1, EDWIN State ofMassachusettahave invented a new and useful Cable-Conduit,` of which thefol` i lowing is a specification. i i Y i This invention relates toaconduit for cables for use in factories and similar places where anumber ofcables have to be sup-A ported and led around the plant. 1 u li The principal objects of the `invention are to provide a `constructionthat will avoid: the present necessity of threading long cables througha closed conductor of the pipe form; to provide an arrangement by whichthe cables can be putin position and held without any materialdanger ofwear` ing their insulating surfaces; to provide a construction whichwithout increasing the external dimensions will beV capableof receivinga very muchlarger number of cables than is now the case; and to provideiniproveniente in the construction of the conduit itself as well as .themeans for holding the sections together and supporting them. Furtherobjects and `advantages of the invention will appear hereinafter.

Reference is to be had to the accompany ing drawings in which Figure 1is a plan of a. system constructed in accordance with this invention:

Fig. 2 is a transverse sectional view of the same on the line 2v2 ofFig. 1;

Fig. 3 is a fragmentary section of part of the conduit on enlargedscale;

Fig. 1 is a plan of a corner boX as cut out before the sides and endsare turned up, and

Fig. 5 is a similar view of the cover therefor.

1t is customary to lead cables around factories and the like in pipeswhich are connected together by'means of flanges in a well known manner.This system although universally use d is open to several objections. Itis a long` difficult job to thread the cables through a piece of piping.1n doing this it is a difficult thing to avoid abrasion of the externalsurface of the instr lating material on the cables, especially when theyenter the end of the pipe and in passing around bends; 1t is practicallyimpossible to thread a cable 1n one operation all the way through a longsystem of piping and pipes have to be taken down or at leastdisconnected at their ends in order to Speccation of Letters Patent.

Application led January 21, 1918. SerialNo. 212,915.

. V.``HAM, a citizen of the United States, residingv at; Vorcesteninthecounty of Worcester and `i atentea sept. 9.1919.

put in additional cables or to replace the cables takenout. Itis ofcourse impossible to l entirely rfill the cylindrical pipe with` cablesbecause of the` difliculty `of drawing them through when their oppositeside sur-g` faces contact withfthe inner surface of the pipe and thesurface of an adjacent cable respectively. This inventionis designed vtoovercome these difficulties in an exceedingly simple and inexpensiveway, in fact to effect a material saving by `using a much smallerconduit than would otherwise be required for any given number of cables.

Referring to the drawingsit will be seen that the conduit for the cablesis made up of a series of pipesections 10 constructed like ordinary pipe`sections except that a small portion, preferably less thansemi-circular7` atathe top as indicated by the numeral 11 is cut ofi'throughout the length of several sections of conduit. This is preferablycut olf alone a horizontal plane, if the conduit lies horizontally,although that is not absolutely essential. But that leavesl a surface 12on the top of each side of the pipe section 10 for supporting the cover11 and it also leavesthe `metal projectingun' der the" edge of the coverinto which screws 13 can be inserted, the heads of which pro ject overthe joint and being located on opposite sides hold the cover firmly inposition. This constitutes an extremely simple way of holding thesecovers. They are also held at the ends by a two-part flange 1nember,each half being in the form of a semicylindrical element 15 with asemi-circular flange 16 integrally connected with it, the flanges beingprovided with diametrical webs 17 which are bolted together, These arepreferably made a little less than semicylindrical so that uponfastening them together the bolts themselves will cause them to bind onthe exterior surfaces of the pipe sections 10 and covers 11.v both ofwhich may be engaged and clamped in position. The flanges 16 are alsoprovided with bolt holes so that two adjacent flanges can be boltedtogether to connect two sections of the conduit.

It will be understood that if desired the two members 10 and 11 can beformed or rolled from flat stock into the desired shape.

Where the conduit sections come together in such a manner as to changetheir direction so as to necessitate an angle fitting in ordinary pipingthe desired result is se- Ythe 'ends of the conduits.

20 face just under the 30 fastening tabs'28.

cured by means of rectangular corner boxes 20. 'These can be made ,up ofsheet metal stamped out, each with a central portion 21y and fourportions in the form of two sides 5 22 and two ends 23, and two of theseparts can be perforated as at 24 toV register with VV-hen the con duitsare inserted in this manner the end Vflanges 16 lare bolted to theVouter surface of the box around the openings 24. It will be understood,of course, that these openingsV vmay be in any Vof the parts of the boxand in any location therein .according to the particular relativeposition of the two conduits. The one shown vconstitutes a right Ymovedalso the-conduit is left open throughout its length so that the cablescan simply be laidin position. The cover is shown as having projections27 for completing the sides or ends that are cut away and Vwith It willbe understood, of course, that the sections of the conduit are supportedin the usual open wire or any desired way. For this purpose hooks 29 areshown. Y

It will be seen, therefore, that the disadvantages above mentioned areall overcome in this extremely simple way and none Y wish to be limitedto all the details of construction herein shown and described, but whatI do claim is:

A cable conduit system comprising a series of cylindrical sectionsarranged substantially in contact end to end throughout the length ofthe system, each section having a longitudinal opening on top throughoutits length, said openings registering with each other lingitudinally soas to leave a continuous opening, whereby the cables can be placed inthem from above through the continuous opening, longitudinal segmentalcover plates resting on the edges of said sections, and fasteningdevices entering the section near the edges of the opening to hold thecover plates in position.

In testimony whereof I have hereunto alixed my signature,

EDWIN W. HAM.

'Copies of this patentY may be Vobtained for ve cents each, byaddressing the Commissioner of Patents,

. Y Y Washington, D. C.

